[Defiant]

If they are programmed wrong, and accidentally go 40 in a 35, how will it know to pull over for Barney Fife?

[RegulatorCountry]

When robocop shoots the tires out from under it, I guess?

[Fungi]

Let the elite leftists at Google figure that one out. A lot of questions now, a long time left to sort them out.

[Greysard]

If they are programmed wrong, and accidentally go 40 in a 35, how will it know to pull over for Barney Fife?

These cars are not preprogrammed; they look at signs and road markings. This is necessary to drive in construction zones and on new roads. As result, these cars always obey the law. As an owner, you will only select the destination - and, if desired, the route. (The car may know which route is shorter, but it may not know or care that the green arrow in one specific place is on only for ten seconds every five minutes. But you do care about that.)